multiple mitochondrial dysfunctions syndrome 6
MONDO:0054785Mondo
Findings
No curated finding names multiple mitochondrial dysfunctions syndrome 6 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
- Inheritance
- Autosomal recessive inheritance
- Onset and course
- Infantile onset · Progressive · Childhood onset
HPO, annotations 2026-09-02
Features
21 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Absent speechHPOHP:0001344
- 5 of 5 reported patients
- Developmental regressionHPOHP:0002376
- 5 of 5 reported patients
- Global developmental delayHPOHP:0001263
- 5 of 5 reported patients
- Inability to walkHPOHP:0002540
- 5 of 5 reported patients
- HypotoniaHPOHP:0001252
- 4 of 5 reported patients
- SeizureHPOHP:0001250
- 4 of 5 reported patients
- Cerebellar atrophyHPOHP:0001272
- 3 of 5 reported patients
- Increased circulating lactate concentrationHPOHP:0002151
- 3 of 5 reported patients
- DystoniaHPOHP:0001332
- 2 of 5 reported patients
- Epileptic encephalopathyHPOHP:0200134
- 2 of 5 reported patients
- Failure to thriveHPOHP:0001508
- 2 of 5 reported patients
- Secondary microcephalyHPOHP:0005484
- 2 of 5 reported patients
Show the remaining 9
- Visual lossHPOHP:0000572
- 2 of 5 reported patients
- AtaxiaHPOHP:0001251
- 1 of 5 reported patients
- Atrophy/Degeneration affecting the brainstemHPOHP:0007366
- 1 of 5 reported patients
- DysmetriaHPOHP:0001310
- 1 of 5 reported patients
- Optic atrophyHPOHP:0000648
- 1 of 5 reported patients
- Feeding difficultiesHPOHP:0011968
- Intellectual disabilityHPO
Genes
1 gene
Germline variants in the gene encoding each protein, as classified by GenCC submitters, each in their own words. Limited, disputed and refuted submissions are listed too.
- PMPCBHGNC:9119
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2020
- Strong · PanelApp Australia · Autosomal recessive · 2025
- Strong · G2P · Autosomal recessive · 2019
- Moderate · Ambry Genetics · Autosomal recessive · 2018
- Moderate · Illumina · Autosomal recessive · 2019
Where it sits
Other names
3 names
Resolves to: multiple mitochondrial dysfunctions syndrome 6
- Also called
- MMDS6multiple mitochondrial dysfunctions syndrome type 6PMPCB deficiency